package com.changgou.interceptor;

import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;
import java.util.Enumeration;

@Component
public class FeignInterceptor implements RequestInterceptor {


    @Override
    public void apply(RequestTemplate template) {

        RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();

        if (requestAttributes != null) {

            HttpServletRequest request = ((ServletRequestAttributes) requestAttributes).getRequest();

            if (request != null) {
                Enumeration<String> headerNames = request.getHeaderNames();

                while (headerNames.hasMoreElements()) {
                    String headerName = headerNames.nextElement();
                    if (headerName.equals("authorization")) {
                        String headerValue = request.getHeader(headerName);

                        // 传递令牌
                        template.header(headerName, headerValue);

                    }

                }

            }
        }

    }
}
